Dark energy in light of DESI DR1 and Hubble tension

Recently, Dark Energy Spectroscopic Instrument (DESI) collaboration based on their first year data has reported a ≳ 3 σ evidence for an evolving dark energy (DE) against the cosmological constant (CC), so the standard ΛCDM model. However, it is necessary to assess the impact of models able to reduce the Hubble tension on the DESI preference for a dynamical equation of state, where w 0 and w a is the parameters of state equation of DE. In this paper, using DESI DR1 BAO measurements combined with Planck CMB and Pantheon Plus dataset, we perform the Monte Carlo Markov Chain (MCMC) analysis for the w 0 w a CDM model with possible pre-recombination resolutions of the Hubble tension. It is found that, although w 0 > − 1 and w a < 0 are still preferred, the CC is also consistent within 2 σ . The best-fit H 0 is higher than in analyses using pre-DESI BAO data. According to our results, the resolutions of Hubble tension are likely to suppress the preference of DESI for the evolving DE, thus the claim of ruling out the CC needs to be more cautious regarding not only the recent observational data but also the cosmological tensions.